Studies of aminoboranes. Part II. Pyrolysis of monoalkylamine-boranes: some aminoborane trimers (1,3,5-trialkylcyclotriborazanes) and dimers
作者:M. P. Brown、R. W. Heseltine、L. H. Sutcliffe
DOI:10.1039/j19680000612
日期:——
Trimericaminoboranes (RNH·BH2)3, where R = Me, Et, Pr, Bu, and But, each of which occurs in two forms, have been prepared by pyrolyses of the corresponding amine-boranes RNH2,BH3. The dimeric aminoborane (ButNH·BH2)2 was also obtained from pyrolysis of ButNH2,BH3 and a similar dimer (PriNH·BH2)2 was the only aminoborane which could be isolated from the pyrolysis of PriNH2,BH3. Proton magnetic resonance
Studies of aminoboranes. Part I. Reactions involving transfer of hydrogen from N-monoalkyl-substituted aminoboranes and amine–boranes to dimethylaminoborane
作者:M. P. Brown、R. W. Heseltine、D. W. Johnson
DOI:10.1039/j19670000597
日期:——
Dimethylaminoborane reacts with trimericaminoboranes (RNH·BH2)3(R = Et and Pr) to give corresponding borazines: Me2N·BH2+⅓(RNH·BH2)3→ Me2NH,BH3+⅓(RNBH)3 Dimethylaminoborane also reacts with amine–boranes, RNH2,BH3(R = Me, Prn, and Pri). From reactions involving propyl- and isopropyl-amine–borane, stable 1,1-dimethyl-3,5-dialkylcyclotriborazanes, which are in effect cyclic mixed adducts, Me2N·BH2,2RNH·BH2
Convenient direct syntheses of novel fused-ring CB4N5 systems by nitrile hydroboration †
作者:Robert Coult、Mark A. Fox、Brian Rand、Kenneth Wade、Aidan V. K. Westwood
DOI:10.1039/a705523d
日期:——
Reactions between B2H6 or BH3·thf (thf = tetrahydrofuran) and nitriles RCN (R = Me, Et, But or CH2F), previously known to generate borazines (RCH2NBH)3 have been found to generate also 25â37% yields of novel carboraza bicyclic systems related to dihydronaphthalene, H3B4N5(RCH2)4CHR, thus affording for the first time a direct route from commercially available acyclic reagents into mixed carbonâboronânitrogen heterocyclic chemistry.